Stability and synthesis of superheavy elements: Fighting the battle against fission – example of $^{254}$No

A. Lopez-Martens (1) , G. Henning (1) , T.L. Khoo , D. Seweryniak , M. Alcorta , M. Asai , B.B. Back , P. Bertone , D. Boilley (2, 3) , M.P. Carpenter , C.J. Chiara , P. Chowdhury , B. Gall , P.T. Greenlees , G. Gurdal , K. Hauschild , A. Heinz , C.R. Hoffman , R.V.F. Janssens , A.V. Karpov , B.P. Kay , F.G. Kondev , S. Lakshmi , T. Lauristen , C.J. Lister , E.A. Mccutchan , C. Nair , J. Piot (4, 3) , D. Potterveld , P. Reiter , N. Rowley (5) , A.M. Rogers , S. Zhu

1 CSNSM - Centre de Sciences Nucléaires et de Sciences de la Matière
2 NU - Normandie Université
3 GANIL - Grand Accélérateur National d'Ions Lourds
4 IPHC - Institut Pluridisciplinaire Hubert Curien
5 IPNO - Institut de Physique Nucléaire d'Orsay

Superheavy nuclei exist solely due to quantum shell effects, which create a pocket in the potential-energy surface of the nucleus, thus providing a barrier against spontaneous fission. Determining the height of the fission barrier and its angular-momentum dependence is important to quantify the role that microscopic shell corrections play in enhancing and extending the limits of nuclear stability. In this talk, the first measurement of a fission barrier in the very heavy nucleus 254No will be presented.

Domaines: Physique Nucléaire Expérimentale [nucl-ex]

A. Lopez-Martens, G. Henning, T.L. Khoo, D. Seweryniak, M. Alcorta, et al.. Stability and synthesis of superheavy elements: Fighting the battle against fission – example of $^{254}$No. Nobel Symposium NS160 – Chemistry and Physics of Heavy and Superheavy Elements, May 2016, Lund, Sweden. pp.03001, ⟨10.1051/epjconf/201613103001⟩. ⟨in2p3-01406665⟩